Hygienic absorbent with odour control
CA 2363600 A1 · Owner: Besemer, Arie Cornelis · Inventors: Verwilligen, Anne-Mieke Yvonne Wilhelmina; Thornton, Jeffrey; Besemer, Arie Cornelis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A superabsorbent material with enhanced odour control and control of bacterial growth comprises a non-acidic, alkali-neutralising compound selected from acid anhydrides, lactides, lactones and hydrolysable esters especially cyclic acid , anhydrides, lactides and lactones of .gamma.- or .delta.-carboxylic acids. The superabsorbent material can be used in hygiene products such as diapers.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed April 6, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 6, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.